Tell him you can block off any of the images like that with a program called "safe for work." And that is found on the safeforwork.com website. Might want to make sure it's .com, I've never been to it, but I've heard stories.

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disclaimer:
MightyMouse does not neccessarily know what he's talking about.
Anything he says that may not make sense cannot be used against
him by other pathetic/respectable individuals.